Marine Hull: Machinery Insurance covers all ocean-going vessels including fishing trawlers and speed boats. This policy covers all risks of physical loss or damage to the vessel while Sailing or navigating with Pilots, While on trial trips While towing and/or assisting any other vessels or craft in distress (provided not under a pre-arranged contract), or customary towage of the insured vessel in connection with loading and discharging operations. The classes available are as follows: Institute Fishing Vessel Clauses, Institute Yacht Clauses, Institute Time Clauses – Hulls, Institute Voyage Clauses – Hulls .